![]() Regulators are used in the air preparation stage, as well as in control of cylinders and motors. Pressure regulators in pneumatic systems limit pressure downstream of the unit by blocking pressure upstream at the inlet. As such, relief valves are often called safety valves and are not typically appropriate for use anywhere but the air preparation stage. Relief valves are typically used only in receivers or air storage devices, such as accumulators, as a means to prevent excessive pressurization. ![]() Pressure relief valves will control pressure at their inlet port by exhausting pressure to atmosphere. What is shared in the conduction of any fluid power medium is the need for valves to control force, velocity and direction of movement. Although the medium is fluid, just as hydraulic or process water systems, the execution of control is different in many ways than with a liquid. Compressed air pneumatic systems require methods of safe and precise control of the actuators unique to their accoutrement.
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